Exterior Dry Wash at Zurich (LSZH)

What changes at Zurich?

Zurich sits at 1,417 feet elevation, nine kilometres north-east of the city centre, with three runways—the longest 3,700 metres—and operates from 06:00 to 23:30 local. The final half-hour is reserved for clearing delays; any movement between 23:30 and 06:00 requires a special permit, and the airport has enforced this curfew without routine exceptions since July 2010. For detailing, that means aircraft overnighting from late evening onward offer the practical window: a crew can begin work after 23:30 and finish well before the 06:00 reopening, leaving the jet clean on stand for an early departure slot.

The General Aviation Center—home to handling agents present at the airport—operates 06:00 to 22:00 daily and lists both interior and exterior cleaning among its in-house services. When a third-party detailing crew arrives, the handler expects advance notice, a valid airside escort and proof of insurance. Zurich is slot-coordinated; every arrival and departure requires a confirmed slot, so any delay to release an aircraft creates ripple effects across the morning schedule. Dry wash avoids the wait for a wash bay, the need for wastewater disposal and the risk of freezing standing water during the alpine winter.

Why does a waterless process suit Zurich's ramp environment?

Ramp washing with hoses generates litres of contaminated runoff carrying hydraulic fluid, exhaust residue and degreaser. Swiss environmental rules treat that mix as hazardous waste; it cannot flow into storm drains, and collecting it on an active apron is impractical. A dry-wash crew carries product, microfibre and waste bags onto the stand, works section by section and leaves nothing behind but a clean aircraft. The handler sees no puddles, no hose reels and no request for GPU power to run pumps.

Waterless chemistry relies on surfactants and lubricants that encapsulate dirt, lifting it away from the paint without scratching. The crew sprays a panel, lets the product dwell for thirty seconds, then wipes with a clean microfibre towel—one pass to loosen, a second to buff. Bug strikes on the nose and leading edges need a dedicated remover; belly grime and gear-bay oil call for a heavier degreaser, applied by hand and wiped until the aluminium or composite shows clean. Exterior windows, navigation lights and the cheat line all receive the same attention, and any accessible brightwork—intake lips, nacelle rings—is touched up to remove oxidation. Duration runs three to eight hours depending on fuselage length, wing area and the amount of carbon staining on the tail cone.

What do handlers at Zurich expect from a third-party detailing crew?

Handling agents present at the airport manage dozens of movements each day inside a tight curfew envelope, so they expect any external service provider to arrive with paperwork complete, insurance current and a named escort waiting. The detailing crew submits a ramp-access request twenty-four to forty-eight hours ahead, listing each technician, passport or ID number, vehicle registration and the tail number to be cleaned. On the day, the escort meets the crew at the security gate, checks credentials and walks them to the stand. The handler also wants confirmation that no ladders will lean against the fuselage without protective pads, no cleaning agent will touch avionics cooling scoops or static ports and no technician will open a panel or tech-log door without flight-crew approval.

If the aircraft is cold-soaked after descent, the crew waits for surface temperatures to stabilise before applying product; spraying onto ice-cold paint can leave streaks or cause the surfactant to bead. If GPU power is needed for cabin lighting so the exterior-window clean can be inspected from inside, the handler arranges it and logs the hours. At the end of the job, all waste towels, empty bottles and packaging leave the ramp in the crew's vehicle. The handler signs off the stand, the escort logs the crew out and the aircraft is released for its morning slot.

How does alpine weather affect the exterior between washes?

Zurich's climate swings from warm, hazy summers—when ozone, pollen and diesel particulate settle on parked jets—to cold winters with frost, de-icing fluid and road-salt spray drifting across the apron. In summer, an aircraft that flies daily through the lower flight levels collects bug protein on the nose, wing leading edges and engine inlets; if left for a week, the residue bakes onto the paint and requires a dedicated remover and extra dwell time. Exhaust carbon streaks the tail cone and belly after every flight, and hydraulic mist from gear retraction leaves an oily film on the wheel wells and aft fuselage.

Winter brings a different set of problems. De-icing fluid—Type I glycol for immediate departure, Type IV thickened polymer for longer holdover—runs down the fuselage during application and dries to a sticky film that attracts dirt. If the aircraft then sits overnight in freezing fog, the film traps moisture and can stain the cheat line. Brightwork oxidises faster in cold, wet air, and any standing water in panel gaps or hinge lines can freeze and stress the structure. A dry wash every two to four weeks keeps the paint clean, the leading edges free of ice-nucleation sites and the belly degreased so that pre-flight inspections show true fluid leaks rather than old staining.

Exterior Dry Wash at Zurich for fleet operators: recurring schedules inside the curfew

Flight departments running regular European circuits—Geneva, Munich, Paris, London—often overnight at Zurich two or three times a month, and each stop is an opportunity to restore the exterior without pulling the aircraft off the line. A recurring dry-wash schedule is written into the fleet's maintenance tracker: every third Zurich overnight, or every four weeks, whichever comes first. The detailing crew receives the tail number and stand assignment from dispatch, coordinates the airside escort through the handler and begins work as soon as the curfew descends and the apron quiets.

By morning the jet is clean, the tech log carries a service sticker with the date and the flight crew walks out to an aircraft that reflects the standard they expect. For charter operators, the calculus is slightly different: a one-off wash before a high-profile client leg justifies the call-out fee, but a standing contract with monthly visits spreads the cost and ensures the aircraft never looks neglected. Either way, the work happens on the ramp, the handler sees a professional operation and the aircraft departs on time.

What about access to the General Aviation Center and remote stands?

Most business jets at Zurich park at the General Aviation Center on the north side of the field or on remote stands closer to the main terminal apron. The GAC offers covered parking, hangarage and direct access from the FBO terminal, which simplifies coordination: the handler knows the stand number, the crew drives to the designated gate and the escort is waiting. Remote stands require a longer drive across the airside road network and sometimes a second security check, but the process is identical—paperwork, escort, work, sign-off.

If the aircraft is inside a hangar, the dry wash can proceed without weather delays, and the crew has access to mains lighting and climate control. On an open stand, work stops if rain begins—waterless products do not perform in wet conditions—and resumes when the fuselage dries. Wind is less of a problem; microfibre towels do not blow away like water spray, and the crew simply works upwind to downwind to avoid re-contaminating cleaned sections. Either way, the handler expects the stand to be returned in the same condition it was assigned: no equipment left behind, no fluid spills, no foreign-object debris.